5 * Generate limit MPs for C types
7 * (c) 2006 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Header files ------------------------------------------------------*/
38 #if __STDC_VERSION__ >= 199900l
40 # include <inttypes.h>
46 /*----- Data types --------------------------------------------------------*/
48 /* --- Hack for GCC --- *
50 * WG14 in their infinite wisdom decided not to use the GCC constant name.
53 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
54 # define EXT __extension__
59 #if defined(LONG_LONG_MIN) && !defined(LLONG_MIN)
60 # define LLONG_MIN EXT LONG_LONG_MIN
63 #if defined(LONG_LONG_MAX) && !defined(LLONG_MAX)
64 # define LLONG_MAX EXT LONG_LONG_MAX
67 #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX)
68 # define ULLONG_MAX EXT ULONG_LONG_MAX
71 /* --- Choose the largest integer type --- */
73 #if defined(INTMAX_MAX)
74 typedef intmax_t imax;
75 #elif defined(LLONG_MAX)
76 EXT typedef long long imax;
81 #if defined(UINTMAX_MAX)
82 typedef uintmax_t umax;
83 #elif defined(ULLONG_MAX)
84 EXT typedef unsigned long long umax;
86 typedef unsigned long umax;
89 /*----- Main code ---------------------------------------------------------*/
93 enum { NEG, POS, NSIGN };
96 int gmap[TABSZ][NSIGN];
97 struct { int g, s; } qmap[TABSZ];
102 static void dump(mp *x)
107 w = (MPW_BITS + 3)/4;
109 while (2 + 2 * n * (4 + w) < 72) n <<= 1;
112 printf("0x%0*x", w, x->v[i]);
114 if (i >= MP_LEN(x)) break;
116 if (i % n) fputs(" ", stdout); else fputs("\n ", stdout);
121 static void doemit(umax c, int s, int *gg, int *qq)
126 for (i = 0; i < n; i++) {
134 gmap[i][POS] = gmap[i][NEG] = -1;
136 MP_FROMINT(x, umax, c);
137 printf("static mpw guts_%d[] = {\n", q);
139 fputs("};\n\n", stdout);
145 if (gmap[i][s] < 0) {
155 static void emit(imax c, int *gg, int *qq)
160 if (c >= 0) { uc = c; s = POS; }
161 else { uc = -c; s = NEG; }
162 doemit(uc, s, gg, qq);
165 static void uemit(umax c, int *gg, int *qq) { doemit(c, POS, gg, qq); }
174 { "SCHAR", SCHAR_MIN, SCHAR_MAX },
175 { "CHAR", CHAR_MIN, CHAR_MAX },
176 { "UCHAR", 0, UCHAR_MAX },
177 { "UINT8", 0, 0xff },
178 { "SHRT", SHRT_MIN, SHRT_MAX },
179 { "USHRT", 0, USHRT_MAX },
180 { "UINT16", 0, 0xffff },
181 { "INT", INT_MIN, INT_MAX },
182 { "UINT", 0, UINT_MAX },
183 { "LONG", LONG_MIN, LONG_MAX },
184 { "ULONG", 0, ULONG_MAX },
185 { "UINT32", 0, 0xffffffff },
187 { "LLONG", LLONG_MIN, LLONG_MAX },
188 { "ULLONG", 0, ULLONG_MAX },
190 { "SIZET", 0, ~(size_t)0 },
194 static void dogen(void)
198 for (i = 0; tab[i].name; i++) {
200 emit(tab[i].min, &tab[i].gmin, &tab[i].qmin);
201 uemit(tab[i].max, &tab[i].gmax, &tab[i].qmax);
205 static void cgen(void)
212 * C integer limits [generated]\n\
215 #include \"mplimits.h\"\n\
217 #define N(x) (sizeof(x)/sizeof(*x))\n\
218 #define MPpos(x) { x, x + N(x), N(x), 0, MP_CONST, 0 }\n\
219 #define MPneg(x) { x, x + N(x), N(x), 0, MP_CONST|MP_NEG, 0 }\n\
225 fputs("mp mp_limits[] = {\n", stdout);
226 for (i = 0; i < q; i++)
227 printf(" MP%s(guts_%d),\n", qmap[i].s ? "pos" : "neg", qmap[i].g);
228 fputs("};\n", stdout);
231 static void hgen(void)
238 * C integer limits [generated]\n\
241 #ifndef CATACOMB_MPLIMITS_H\n\
242 #define CATACOMB_MPLIMITS_H\n\
244 #ifndef CATACOMB_MP_H\n\
245 # include \"mp.h\"\n\
248 extern mp mp_limits[];\n\
253 for (i = 0; tab[i].name; i++) {
255 printf("#define MP_%s_MIN (&mp_limits[%d])\n",
256 tab[i].name, gmap[tab[i].qmin][NEG]);
258 printf("#define MP_%s_MAX (&mp_limits[%d])\n",
259 tab[i].name, gmap[tab[i].qmax][POS]);
261 fputs("\n#endif\n", stdout);
264 int main(int argc, char *argv[])
266 const char *what = argc == 2 ? argv[1] : "<bogus>";
269 case 'c': cgen(); break;
270 case 'h': hgen(); break;
272 fprintf(stderr, "unknown action `%s'\n", what);
275 if (fflush(stdout) || fclose(stdout)) {
276 fprintf(stderr, "error writing output: %s\n", strerror(errno));
282 /*----- That's all, folks -------------------------------------------------*/